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Discussion Starter #1
Can someone tell me what carb is correct for a 1970 351 4V Mach 1? I am thinking it is an Autolite 4300, but do not have the documentation to support that.

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John
 

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John: I got in touch with a place called carburetorsdirect about this very same question. My /70 351C has a Holly something and asked the question. It is supposed to be a Autolite 4300. Mark
 

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Mark is correct, your Mach would have had an Autolite 4300 from the factory, 605 CFM rating.

D0OF-C, Y or AC: 351-4V Auto, w/0 A/C
D0OF-D, Z or AB: 351-4V Stick, w/0 A/C
D0OF-H, AA or AD: 351-4V Auto, w/A/C
D0OF-G: 351-4V Stick, w/A/C
 

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Discussion Starter #4
Thanks guys. Very helpful information.
 

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Discussion Starter #5
Hey Hemikiller, do you know the difference between the D0OF-C, Y or AC and the D0OF-H, AA or AD? Clearly it has to to with the AC. Is there an idle kick-up for when the AC is activated or something like that? Can the part be added to a non-ac carb? I have a line on a D00F-AC and am wondering if it could be modified.

Thanks
John
 

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In the shop manual the differences would be listed in the carb section.
 

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Yes, the H, AA, AD has a solinoid and bracket that kicked up the idle when A/C was switched on. Had a short single wire that plugged into a female bullet connector at the firewall.
 

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Send me a pm and I can give you a copy of the Autolite 4300 service manual in pdf format.
 
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